Sanding wheel head



Sept. 23, 1941. F H, M RRIS 2,257,061

SANDING WHEEL HEAD Filed Sept. 23, 1938 2 Sheets-Sheet 1 IN V EN TOR.

A TTQRNEYS.

Sept. 23, 1941. I F H MQRRIS 2,257,061

SANDING WHEEL HEAD Filed Sept. 25, 1938 2 Sheets-Sheet 2 14 5555 5 l I 1A 7 4 I i9 6 16 I EZZMOFPLS INVENTOR. I I 7 j i BY ATTORNEYS.

Patented Sept. 23, 1941 UNHTED STATES P OFFICE SANDING WHEEL HEAD FredH. Morris, High Point, N. 0., assignor to Pearson Sanding MachineCompany, High Point, N. C.

11 Claims.

This invention relates to sanding wheel heads, the primary object of theinvention being to provide a sanding wheel head including a continuouscircular rubber cushion, constructed in such a way that portions of thecushion interlock with the central portion or core of the sanding wheelhead with the result that movement of the cushion with respect to thecore of the head will be prevented An important object of the inventionis to provide a sanding wheel head wherein the hub and core are providedwith recesses adapted to receive extensions of the cushioning member theextensions having openings for the reception of securing bolts forsecuring the sections together, the construction of the cushioningmember being such as to insure against the cushioning member becomingloose from the hub of the sanding wheel head, when the sanding wheelhead is in operation. l

Another object of the invention is to provide means for securing thesanding cloth to the I cushioning member of the sanding wheel head,

the securing means holding the cloth in such a way to insure against thecloth creeping or slipping over the periphery of the cushioning member.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein described, may be made within thescope of what is claimed,

.without departing from the spirit of the invention.

Referring to the drawings:

Figure 1 is an elevational View of a sanding wheel head constructed inaccordance with the invention.

Figure 2 is a sectional view taken on line 2.2 of Figure 1.

Figure 3 is a side elevational View of a sanding wheel head one of theside plates thereof having been removed.

Figure 4 is a side elevational view of the hub or core of the sandingwheel head.

Figure 5 is a sectional view taken on line 55 of Figure 1.

Referring to the drawings in detail, the hub or core of the wheel isindicated generally by the reference character 5, the hub or core beingconstructed preferably of metal to lend Weight to the 5 is formed withan inwardly extended flange 6 which is provided with inwardly extendedofisets 1, defining a plurality of supporting surfaces 8. The hub orcore also includes a disk 9 which is positioned against the edge of theflange 6, to secure the cushioning member, to be hereinafter more fullydescribed, in position on the hub or core.

The cushioning member is indicated by the reference character l0 and isconstructed preferably of rubber material, the cushioning member beingformed with extensions I l of a construction to fit within the offsetmembers of the flange 6, providing an interlocking structure forsecuring the cushioning member I0 to the hub or core 5. Extendinginwardly from the periphery of the cushioning member, and disposed atpoints directly opposite to the olfsets T, are slots, which are designedfor the reception of the sanding cloth, which is indicated bythereference character l3.

' Bolts indicated by the reference character i i, extend throughaligning openings in the hub or core 5, disk 9 and cushioning member ID,securing the various sections of the sanding wheel head together.

On positioning the sanding cloth l3, the sandingcloth is placed againstthe periphery of the cushioning member I", and portions of the sand-.ing cloth are extended into the slots l2, providing loops I5, so thatwhen the bolts 14 are positioned, they will engage the loops of thesanding cloth I3, securing the sanding cloth in position againstslippage while in use. The bolts used in securing the free ends of thesanding cloth to the wheel, are of split formation, one of the boltsbeing shown in section in Figure 5 of the drawings. The split bolt whichis indicated by the reference character I6, is hollow, and when thisbolt is positioned,within the inner end of the slot of the cushioningmember to secure the sanding cloth, the bolt I1 is forced into thehollow bolt l6, causing the side walls of the split bolt IE to expandinto close engagement with the sanding cloth and the cushioning member.

Thus it will be seen that due to this construction, the ends of thesanding cloth which are shown as looped around the split bolt I5, willbe securely held in position.

The securing bolt shown by Figure 5 of the drawings, includes a threadedhead portion [8 formed with a screw driver slot !9, whereby the splitbolt may be positioned in the threaded opening of the head or core ofthe sanding Wheel sanding wheel head. As shown, the core or hub head.

7 ing wheel head disks together.

The shaft on which the sanding wheel head is supported, is indicated bythe reference character 20, one end of the shaft being threaded toreceive the nut 21 to further secure the sand- It wil1 be seen byobserving Figure 2 of the drawings, one side of the hub or core isforced against the shoulder 22 of the shaft 25!.

From the foregoing it will be seen that due to the construction shownand described, I have provided a sanding wheel including a hub or coresection and a cushioning member over which the sanding cloth ispositioned, the hub or core and cushioning member, being provided withmeans whereby they may be interlocked and secured together againstmovement with respect to each other.

Iclaim:

1. In a sanding wheel head, a disk, a flange extending from one surfaceof the disk in spaced relation with the periphery thereof and havingcurved inwardly disposed offset portions, a circular cushioning member,inwardly disposed extensions formed on the cushioning member, saidcushioning member being fitted over the flange, the extensions of thecushioning member being fitted in the offsets of the flange, saidcushioning member having slots formed therein, extending inwardly fromthe periphery thereof and terminating within the offset portions, saidslots adapted to receivea strip of sanding cloth positioned over thecushioning member, said cushioning member being of a thickness equal tothe width of the flange, a second disk adapted to be positioned againstsaid flange and cushioningmember, holding said cushioning member to theflange, and bolts disposed within the oil-set portions of the flange andresting within the openings of the offset portions of the cushioningmemtioned disk clamping the'cushioning member between said disks.

2. In a sanding wheel head, a disk, a flange extending from one side ofthe disk and spaced from the periphery of the disk, said flange havingoffsets, a cushioning member constructed of rubber materialpositioned onthe flange, extensions on the cushioning member and fitted within theoffsets, slots in said extensions, a second disk fitted against theflange and cushioning memben f bolts extending through the disk andextensions on the cushioning member holding a sanding cushioning memberfitted on the flange, exten 5 sions 'on'the cushioning member, saidextensions adapted 'to'fit within the 'ofisets, said cushioning memberhaving slots extending inwardly from the elastic circumferentiallycontinuous wheel rim surrounding said body, the inner periphery of saidcircumferentially continuous rim being provided with integral lugsreceived in said grooves, said circumferentially continuous rim beingprovided with narrow substantially radial grooves which open through theouter periphery and the side faces thereof but not through the innerperiphery thereof, said radial grooves extending into said lugs, todecrease the tensile strength of said lugs and allow them to stretchwhen centrifugal force acts on said rim, an abrasive or other stripsurrounding said circumferentially continuous rim and having loopsreceived in said radial grooves, and means disposed externally of saidbody, extending through said loops and holding the inner ends of saidloops in the closed inner ends of said radial grooves.

5. A device of the class described comprising a wheel body, and flangesat the ends of said body projecting beyond the periphery thereof, atleast one of said flanges being removable from said body'in a directionextending axially of the wheel, an elastic circumferentially continuouswheel rim surrounding said body between said flanges and movable axiallytherefrom when said one of said flanges is removed, saidcircumferentially continuous rim having circumferentially spacedtransverse grooves in its outer periphery and being provided on itsinner periphery with integral lugs into which said grooves extend,

the portions of said grooves which extend into said lugs serving todecrease the tensile strength of said lugs, allowing them to stretchwhen centrifugal force acts on the rim, the outer periphery of said bodybeing provided with lugs between and contacting with said rim lugs, anabrasive or other strip surrounding said rim and ber, said boltsextending through the last mena periphery thereof and terminating withinthe exthe cushioning member between said disks holding the cushioningmember in position.

4. A deviceof the class described comprising a rigid wheel 7 body havingcircumferentially spaced transverse grooves in its periphery, an

having loops extending into said grooves, and pins rigidly secured toone of said flanges, disposed externally of said body and received insaid loops, said pins being parallel with the wheel axis to withdrawfrom said loops when said one' tensile strength of said lugs and allowthem to therein, a shaft extending through the center of the flanged huband disk, and fastening means held fixed at one end and extendingthrough the grooves in the elastic wheel rim and into theopenings in thedisk.

8. A sanding head including a flanged hub 'or core characterized by ahub having a hole through the center thereof, a circumferentiallycontinuous cushioning member fitted in the angle between the'hub andflange, the cushioning member having radial grooves, fastening meansrigidly secured to the flanged hub and extending through the inner endsof the radial grooves, a

disk having a central orifice and openings which receive the free endsof the fastening means, a shaft extending through the holes in thecenter of the hub and disk, and removable means on the shaft forfastening the shaft, cushioning member and disk rigidly together and thesides of the cushioning member clamped between the flanged hub and thedisk.

9. A sanding head including a flanged hub, an elastic wheel rim held inthe angle between the hub and the flange, its diameter being greaterthan that of the flange, the elastic wheel rim having radial grooves, adisk of less diameter than the diameter of the wheel rim, the disk andflanged hub having a centrally located hole, a shaft extending throughthe holes in the flanged hub and the disk, and fastening means securedrigidly to the flanged hub and extending through the latter and throughthe radial grooves in the rim and into holes in the disk, and means onthe shaft for fastening the hub, disk and shaft rigidly together, andfor clamping the sides of the rim between the flange and the disk.

10. A sanding head including a flanged hub with a. hole in the center ofits hub, an elastic wheel rim held in the angle between the hub and theflange, the rim having radial grooves, a disk having openings thereinand a hole through the center, a shaft extending through the holes inthe flanged hub and disk, fastening means rigidly secured to the flangedhub and extended endwise into the radial grooves of the wheel rim andinto the openings in the disk, and means extending through the holes inthe hub and disk for securing the hub, rim and disk together.

11. A sanding head including a flanged hub having a central opening, anelastic wheel rim held in the angle between the hub and the flange, therim having radial grooves, a disk having an opening through the'center,fastening means extending across from the flanged hub to the disk andthrough the grooves, said fastening means rigidly secured at one oftheir ends only and held in position at their opposite ends by one ofsaid parts, and means extending through the holes in the hub and diskfor holding the several parts of the sanding head securely together.

FRED H. MORRIS.

